Sodium-23 NMR and Complex Impedance Studies of Gel Electrolytes Based on Poly(acrylonitrile).

Abstract

Highly conducting gel electrolytes prepared from mixtures of poly(acrylonitrile) (PAN), ethylene carbonate (EC), propylene carbonate (PC) and NaClO4 have been studied by complex impedance, differential scanning calorimetry (DSC) and 23Na nuclear magnetic resonance (NMR) spectroscopy. Ionic motional correlation times spanning nearly five orders of magnitude, probed by temperature-dependent dynamical features of the 23Na quadrupole-broadened NMR lineshape, are strongly influenced by the single glass transition temperature observed in the gel electrolyte. Dielectric measurements of mixtures of PAN, EC and PC suggest that the polar nitrile group in PAN may interact with Na+ ions in the gel. All results are consistent with the conclusion that PAN provides stability to the gel network down to the immediate vicinity of the Na+ ions, rather than acting as a rigid framework for regions of liquid electrolyte. Gel electrolytes, Sodium-23 NMR, Poly(acrylonitrile).

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Document Details

Document Type
Technical Report
Publication Date
Apr 29, 1994
Accession Number
ADA280330

Entities

People

  • F. Croce
  • Jiang Li
  • P. E. Stallworth
  • S. G. Greenbaum
  • S. Slane

Organizations

  • Hunter College

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Alkenes
  • Carbonate Esters
  • Chemical Synthesis
  • Chemistry
  • Dielectric Permittivity
  • Electrical Conductivity
  • Electrolytes
  • Energy
  • Heat Of Activation
  • Ionic Liquids
  • Low Temperature
  • Military Research
  • New York
  • Quantum Properties
  • Relaxation Time
  • United States
  • Universities

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.